<template>
<div>
   <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
       <el-alert title="注意:只允许为第三级分类设置相关参数!" type="warning" show-icon :closable="false">
       </el-alert>
       <!-- 选择商品分类区域 -->
       <el-row class="cat_opt">
         <el-col>
           <span>选择商品分类:</span>
           <!-- 选择商品分类的级联选择框 -->
            <el-cascader
              clearable
              v-model="selectedCateKeys"
              :options="cateList"
              :props="cateProps"
              @change="handleChange">
            </el-cascader>
         </el-col>
       </el-row>
       <!-- tab页签区域 -->
        <el-tabs v-model="activeName" @tab-click="handleClick">
          <!-- 添加动态参数列表 -->
          <el-tab-pane label="动态参数" name="many">
            <!-- 添加参数 -->
            <el-button type="primary" size="mini" :disabled="isButton" @click="addDialogVisible=true">添加参数</el-button>
            <!-- 动态参数的表格 -->
            <el-table :data="manyTableData" border stripe >
              <!-- 展开行 -->
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <!-- 循环渲染tag标签 -->
                  <el-tag v-for="(item ,i) in scope.row.attr_vals" @close="handleClose(i,scope.row)" :key="i" closable>{{item}}</el-tag>
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                </template>
              </el-table-column>
              <!-- 索引列 -->
              <el-table-column type="index"></el-table-column>
              <el-table-column
                label="参数名称"
                prop="attr_name">
              </el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
          <el-tab-pane label="静态属性" name="only">
            <!-- 添加属性 -->
            <el-button type="primary" size="mini" :disabled="isButton" @click="addDialogVisible=true">添加属性</el-button>
            <!-- 静态属性表格 -->
             <el-table :data="onlyTableData" border stripe>
              <!-- 展开行 -->
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <!-- 循环渲染tag标签 -->
                  <el-tag v-for="(item ,i) in scope.row.attr_vals" @close="handleClose(i,scope.row)" :key="i" closable>{{item}}</el-tag>
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                </template>
              </el-table-column>
              <!-- 索引列 -->
              <el-table-column type="index"></el-table-column>
              <el-table-column
                label="属性名称"
                prop="attr_name">
              </el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini"  @click="removeParams(scope.row.attr_id)">删除</el-button>
                </template>
              </el-table-column>
            </el-table>
          </el-tab-pane>
        </el-tabs>
    </el-card>

    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      @close="addDialogClose"
      width="50%">
    <!-- 添加参数对话框 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数的对话框 -->
    <el-dialog
      :title="'编辑'+editText"
      :visible.sync="editDialogVisible"
      @close="editDialogClose"
      width="50%">
    <!-- 修改 参数对话框 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
        <el-form-item :label="editText+'名称'" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
</div>
</template>
<script>
export default{
  data(){
    return {
      // 商品分类列表
      cateList:[],
      // 级联选择框d的配置对象
      cateProps:{
        value:'cat_id',
        label:'cat_name',
        children:'children'
      },
      // 级联选择框双向绑定到的数组
      selectedCateKeys:[],
      //设置默认值
      activeName:'many',
      // 动态参数的数据
      manyTableData:[],
      // 静态属性的数据
      onlyTableData:[],
      // 控制添加对话框的显示与隐藏
      addDialogVisible:false,
      // 添加参数的表单数据对象
      addForm:{
        attr_name:''
      },
      // 添加表单的验证规则
      addFormRules:{
        attr_name:[
          { required: true, message: '请输入活动名称', trigger: 'blur' },
          { min: 3, max: 30, message: '长度在 3 到 30 个字符', trigger: 'blur' }
        ]
      },
      // 修改表单的验证规则
      editFormRules:{
        attr_name:[
          { required: true, message: '请输入活动名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      },
      // 控制修改对话框的显示与隐藏
      editDialogVisible:false,
      // 修改的表单数据对象
      editForm:{
        attr_name:''
      },
      // 控制按钮与文本框的切换显示
      // inputVisible:false,
      // 文本框中输入的内容
      // inputValue:""
    }
  },
  created(){
    this.getCateList()
  },
  methods:{
    getCateList(){
      this.axios.get('categories').then(res=>{
        console.log(res)
        if(res.data.meta.status !== 200){
          return this.$message.error("获取商品分类失败")
        }
        this.cateList=res.data.data
      })
    },
    // 级联选择框选中项变化，会触发这个函数
    handleChange(){
      this.getParamsData()
    },
    // tab标签点击处理函数
    handleClick(){
      console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数的列表数据
    getParamsData(){
      console.log(this.selectedCateKeys)
      if(this.selectedCateKeys.length !==3){
        this.selectedCateKeys=[]
        this.manyTableData=[]
        this.onlyTableData=[]
        return
      }
      // 证明选中的是三级分类
      // 根据所选分类的id和当前所处的面板获取对应的参数
      this.axios.get(`categories/${this.cateId}/attributes`,
       {
          params:{
            sel:this.activeName
          }}).then(res=>{
            console.log(res);
            res.data.data.forEach(item=>{
              item.attr_vals=item.attr_vals ?item.attr_vals.split(' ') :[]
              // 控制文本框的显示与隐藏
              item.inputVisible=false
              // 文本框中的输入值
              item.inputValue=''
            })
            if(res.data.meta.status !== 200){
              return this.$message.error("获取参数列表失败")
            }
            if(this.activeName ==='many'){
              this.manyTableData=res.data.data
            }else{
              this.onlyTableData=res.data.data
            }
          })
    },
    // 监听添加对话框的关闭事件
    addDialogClose(){
      this.$refs.addFormRef.resetFields()
    },
    //点击按钮添加参数
    addParams(){
      this.$refs.addFormRef.validate(valid=>{
        if(!valid)return
        this.axios.post(`categories/${this.cateId}/attributes`,{
          attr_name:this.addForm.attr_name,
          attr_sel:this.activeName,
        }).then(res=>{
          console.log(res)
          if(res.data.meta.status !== 201){
            return this.$message.error("添加参数失败！")
          }
          this.$message.success("添加参数成功")
          this.addDialogVisible=false
          this.getParamsData()
        })
      })
    },
    // 点击按钮展示修改的对话框
    showEditDialog(attr_id){
      this.editDialogVisible=true
      // 查询当前参数的信息
       this.axios.get(`categories/${this.cateId}/attributes/${attr_id}`,{
        params:{attr_sel:this.activeName}
      }).then(res=>{
        console.log(res)
        if(res.data.meta.status !== 200){
          return this.$message.error("获取数据信息失败")
        }
      })
      this.editForm=res.data.data
    },
    // 点击按钮修改数据参数
    editParams(){
      this.$refs.editFormRef.validate(valid=>{
        if(!valid)return
        this.axios.put(`categories${this.cateId}/attributes${this.editForm.attr_id}`,{
         attr_name:this.editForm.attr_name,attr_sel:this.activeName
        }).then(res=>{
          console.log(res)
          if(res.data.meta.status !== 200){
            return this.$message.error("修改参数失败")
          }
          this.$message.success("修改数据成功")
          this.getParamsData()
          this.editDialogVisible=false
        })
      })
    },
    //重置修改的表单
    editDialogClose(){
      this.$refs.editFormRef.resetFields()
    },
    // 根据id删除对应的参数项
    removeParams(attr_id){
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          this.axios.delete(`categories${this.cateId}/attributes/${attr_id}`).then(res=>{
            console.log(res);
            if(res.data.meta.status !== 200){
              return this.message.error("删除参数失败")
            }
          })
          this.$message({
            type: 'success',
            message: '删除成功!'
          });
          // 刷新数据列表
          this.getParamsData()
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });
        });
    },
    // 文本框失去焦点或按下enter键都会触发
    handleInputConfirm(row){
      console.log("ok")
      if(row.inputValue.trim().length == 0){
      row.inputValue=""
      row.inputVisible=false
      return
      }
      // 如果没有return就证明输入的内容需要做后续处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue=""
      // 隐藏输入框
      row.inputVisible=false
      // 发送请求，保存这次操作
      // this.axios.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
      //   attr_name:"row_attr_name",
      //   attr_sel:'row.attr_sel',
      //   attr_vals:'row.attr_vals.join(" ")',
      // }).then(res=>{
      //   console.log(res)
      //   if(res.data.meta.status !== 200){
      //     return this.$message.error("修改参数项失 败")
      //   }
      //   this.$message.success("修改参数项成功")
      // })
      this.saveAttrVals(row)
    },
    // 将attr_vals的操作保存到数组中
    saveAttrVals(row){
      this.axios.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
        attr_name:"row_attr_name",
        attr_sel:'row.attr_sel',
        attr_vals:'row.attr_vals.join(" ")',
      }).then(res=>{
        console.log(res)
        if(res.data.meta.status !== 200){
          return this.$message.error("修改参数项失 败")
        }
        this.$message.success("修改参数项成功")
      })
    },
    // 点击按钮展示文本输入框
    showInput(row){
      row.inputVisible=true
      // 让文本框自动获取焦点
      // $nextTick方法的作用：
      // 就是当页面上的元素被重新渲染之后，才会调用回调函数中的代码
      this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    // 删除对用的参数和选项
    handleClose(i,row){
      row.attr_vals.splice(i,1);
      // 调用封装好的函数
      this.saveAttrVals(row)
    }
  },
  computed:{
    // 如果按钮需要被禁用返回true
    isButton(){
      if(this.selectedCateKeys.length !==3){
        return true;
      }
      return false;
    },
    // 当前选中的三级分类的id
    cateId(){
      if(this.selectedCateKeys.length ===3){
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 动态计算标题的文本
    titleText(){
      if(this.activeName==='many'){
        return "动态参数"
      }
      return "静态属性"
    },
    editText(){
      if(this.activeName==='many'){
        return "参数"
      }
      return "属性"
    }
  }
}
</script>
<style lang="less" scoped>
.el-alert{
  font-size: 16px;
  font-weight: 500
}
.cat_opt{
  margin: 15px 0;
}
.el-tag{
  margin:0 15px
}
.input-new-tag{
  width: 120px
}
</style>
